Empirical evidence suggests that top players often play together in one team. Based on the "O-ring theory" (Kremer 1993) a Zidane clustering theorem is derived. It is argued that the best midfielder is most efficiently allocated when combined with an ace striker, and vice versa. This implies...

On the basis of economic theory, what effects can globalisation be expected to have on trade and growth? Does the empirical evidence support this? What developments will the next phase of globalisation bring?